Suction cleaner



E. R. SWANN sUcTIoN CLEANER Oct. 8, 946

Filed oct. 15, 1945 s sheets-sheet 1 @at 8, 1946. E. R. swANN 2,409,078

SUCTION CLEANER FiledY Oct. 13, 1945 3 Sheets-Sheet fvezlof Edward j. Saya/We @et 8, 194@ YE. R. swANN 2,409,078,

sUcT'IoN CLEANER Filed Oct. l5, 1945 3 Sheets-Sheet 3 fifa/*veeg Patented Oct. 8, 1946 `sperren CLEANER adware n. Swann, Fiorai rai-k, N. 1v., assigner@ The Hoover Company, North Canton, Ohio, a

corporation .of Ohio Application October 13, 1943, Serial No. 586,043

(Cl. 18S-71) The present invention relates to suction clean- Y 1 its ar.-

filter formed of paper folded into a corrugated J filtering area and having the ends of the ridges folded into one plane surface. Another object is to provide a method for foldin a sheet of paper into a corrugated ltering area with the ends of the ridges folded and glued into the plane of the depressions to thus form the corrugated surface. Other objects and advantages of the invention will be apparent from the following specification and drawings, wherein:

Figure l is a longitudinal section of the suction cleaner and showing in dotted lines the suction cleaner cover and the lter supporting structure in open position;

Figure 2 is a section along the line 2 2 of Figure 1;

Figure 3 Figure l Figure e is a fragmentary perspective View of the corrugated lter showing the ends of the is a section along the line 3 3 of corrugations folded into the plane oi the mar- 1' Figure 6 is an end View of the corrugated lter Y showing the ends of the ridges folded and glued in the plane of the marginal edge of the lter.

The embodiment of the invention herein disclosed comprises a suction cleaner provided with a rectangular casing l having a bottom wall li, a pair of opposed side Walls l2, a rear Wall 3 and a front wall irl, the latter being provided with an opening for the removable reception of a dust and dirt receptacle l5, and the bottom Wall Il being formed at its longitudinal corners with projecting ribs forming a pair of runners I6 which Support the cleaner. The casing is closed by a cover il pivoted at i8 on the rear casing wall I3 and is provided at its front end with a latch I which removably engages a catch 2li mounted on the casing front wall i4, and a handie 2| is mounted on the cover il for carrying the suction cleaner.

A partition extends between the casing side walls t2 and cooperates with the latter, the bottom wall H and front wall I4 to form a compartment 26 for the reception of the dirt receptacle l5. The dirt receptacle lhas a bottom wall 21, opposed sidewalls 28, rea-r Wall 29 and a front wall 3G, the side and rear walls having their marginal -edges outwardly flanged at 3l for engagement with the casing side walls l2 and with the partition 25 to hold the receptacle in position in the casing ID. A latch is mounted on the casing front wall i4 and is provided with a pivoted arm 32 which engages a catch 33 on the dirt receptacle front wall 30 to lock the receptacle in the casing Hi. An air inlet conduit is mounted on the dirt `receptacle front Wall 3% and communicates with an opening 36 in the latter exposed lto the dirt receptacle, while a flexible hose El is removably connected to the conduit 35. A suitable surface cleaning tool 38, only partially shown, is connected to the opposite end of the hose Slforfcleaning -surfaces as is well known in the art.

Mounted within the cover Il between the side Walls is a partition 48, and secured to the latter and depending walls of the cover I7 is an L- shaped bracket 4| having a ange 42 extending in one plane. Spaced rods 43 extend longitudinally of the cover I'I and have their yopposite ends 44 supported von the ange 42 of the bracket 4|, and the intermediate portions 45 vof the rods 43 project beyond theplane ofthe ends of 4the rods 43 into .the compartment .26 when the cover His closed.

A paper filter 4'! permeable to air, but not to' `the alternate .lines 5I to form the depressions 49 in the corrugated ltering surface, and the paper is then folded along .the lines 52 to vform the ridges i8. Triangular areas 53 Vare provided at Ythe opposite ends of the ridge lines 52 by a pair of diverging lines 53 extending to the marginal edge of vthe paper, and the paper is folded along the diverging lines 54 over the shaded portions AE5 and glued Ytogether as indicated at 56, and the resulting adjacent Afolds 5l are glued to the portion 58V of the paper as indicated at 59. By forming the adjacent folds 51 and gluing them together, that portion of the pa-per between the adjacent ridge lines 52 is drawn together which causes the paper to become corrugated forming the ridges 48 and the depressions 4S. The triangular areas 53 being also glued at the marginal edge of the paper causes the triangular areas to be inclined from the marginal edge of the paper to the ridges 48 and serve to maintain the ridges 43 in projected position relative to the depressions 49. It will be noted that the ridges 48 and depressions 49 terminate in one plane at the marginal edge of the filter.

The filter 41 is supported in the casing I0 by placing the marginal edge on the flange 63 of a bracket 64 mounted on the casing front and side walls and the partition 25, and the ridges 48 of the filter project into the compartment 26, while Y the depressions 49 lie in the plane of the marginal edge of the filter 41. The rods 43 fit in the ridges 48 of the filter and maintain the ridges in proper position against the force of the dir tladen air as it travels in the direction indicated by the arrows in Figures 1 and 3. The filter 41 is clamped at its marginal edge between the anges 42 and 63 of the brackets 4| and 64, respectively, when the cover I1 is locked in position. An air-tight seal is provided adjacent the marginal edge of the filter by means of a rubber 65 supported in the bracket 64 and engages the fiange 42 when the cover I1 is locked in position.

A compartment 68 is formed in the casing by the partition 25, the casing side walls I2, rear wall I3 and bottom wall II. A vertically arranged motor in the compartment 68 has its housing 69 provided with a flange 10 which is removably supported on a bracket 1I mounted on the casing I I] and partition 25. Mounted above the motor on the armature shaft is a dual-stage suction creating fan 12 enclosed in a fan housing 13 supported by screws 14 on the motor housing 69. An annular bracket 15 positions the fan housing 13 in the compartment 68 and provides an air tight seal between the upper end of the fan housing 13 and the adjacent walls of the compartment 68. The fan housing 13 has a fan eye 16 which communicates through a pasfsageway 11 with an elongated opening 18 in the partition 40, the passageway 11 being formed by the partition 40, cover I1 and the fan housing 13. Annularly arranged in the fan housing 13 are air outlet ports 19 which exhaust air into the compartment 68 and thence to inlet ports 80' in the motor housing 69 from which the air is exhausted through ports 8l to thus cool the motor. The filtered air discharged by the fan passes through an opening 83 connected to an exhaust conduit 82 mounted on the casing rear wall I3, and an arcuate wall 84 guides the air to the opening 83. A hose 85, only partially shown, may be connected to the conduit 82 when it is desired to clean surfaces by blowing air as will be understood by those experienced in the art.

In operation, assume the casing cover I1 is closed and the motor and fan operating. The suction caused by the rotating fan draws dirtladen air from the surface being cleaned through the cleaning tool 38, hose 31 into the compartment 26 and the dirt-laden air strikes the surface of the filter 41 exposed to the dirt receptacle I5. The filter 41 removes the dirt and dust from the air and the dirt particles drop into the re-v ceptacle I5 as indicated at 85. Heavy particles of dirt may drop directly into the receptacle I5 without striking the filter 41 due to the enlarged area of the compartment 26 relative to the hose 31. The filtered air passes through the air passageway 86 disposed between the cover I1 andl the filter 41 and thence through the elongated opening 13 to the eye 16 of the fan chamber, and the air is expelled into the chamber 68 and thence through the ports 82 and 8l to ventilate the motor, and all of the air is exhausted through the air conduit 82. During the cleaning operation, the filter supporting rods 43 maintain the ridges 48 in the filter 41 against the force of the air stream, and the force of the latter maintains the depressions 49 in the filter.

In order to clean the dirt receptacle the latch arm 32 isv rotated and the receptacle removed by pulling on the inlet conduit 35. When it is desired to remove the filter 41, the latch I9 is unlocked and the cover I1 raised to the dotted line position shown in Figure l, and the filter is removed from the fiat flanged surface 63 of the bracket 64. To replace the filter, the marginal edge of the latter is arranged on the flat flange 63 with the filter ridges 45S projecting into the compartment 26, and thereafter the cover I1 is closed whereby the rods 43 enter the ridges 48 of the lter. When the latch I9 is locked, the marginal edge of the filter is clamped in one plane between the two flat flanges 42 and 63 of the brackets 4I and 64, respectively, and the rubber 65 provides an air seal between the cover I1 and the lower part of the casing.

I claim:

1. A suction cleaner comprising a casing, a movable cover for said casing, a filter having elongated corrugations including alternate ridges and depressions each terminating at their opposite ends in one plane 'at the marginal edge of said filter, cooperating means on said cover and casing each in one plane, closing said cover clamping said marginal edge of said filter in one plane, and a filter supporting frame mounted in said cover and movable therewith, closing said cover positioning said frame only in the said ridges of said lter to support said ridges against the force of said air stream and said depressions unsupported.

2. In a suction cleaner, a casing having an opening, a filter closing said opening, said filter having elongated corrugations including alternate ridges and depressions each terminating at their opposite ends in the same plane, means on which the marginal edge of said filter rests to close said opening, and a filter supporting frame movably mounted on said casing and movable into operative position to arrange said frame in said ridges of said filter but leaving said depressions unsupported, said marginal edge of said filter being the sole support of said ridges and depressions when said supporting frame is moved to inoperative position.

3. In a suction cleaner, a casing having an opening, a filter removably closing said opening, said filter having elongated corrugations including alternate ridges and depressions each terminating at their opposite ends in the same plane, means for supporting the marginal edge of said filter to close said opening, a cover plvotally mounted on said casing, a filter supporting frame carried by said cover and arranged with respect to said filter to support said ridges of said filter but leaving said depressions unsupported when said cover is in closed position, said cover movable to open position to remove said frame from lsaid marginal lter supporting means.

EDWARD R. SWANN. 

